aboutsummaryrefslogtreecommitdiffhomepage
path: root/inc/poche/Poche.class.php
blob: e9b14121631130647b9fae84b3222130cab6dc6d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
<?php
/**
 * wallabag, self hostable application allowing you to not miss any content anymore
 *
 * @category   wallabag
 * @author     Nicolas Lœuillet <nicolas@loeuillet.org>
 * @copyright  2013
 * @license    http://www.wtfpl.net/ see COPYING file
 */

class Poche
{
    public static $canRenderTemplates = true;
    public static $configFileAvailable = true;

    public $user;
    public $store;
    public $tpl;
    public $messages;
    public $pagination;
    
    private $currentTheme = '';
    private $currentLanguage = '';
    private $notInstalledMessage = array();

    public function __construct()
    {
        if ($this->configFileIsAvailable()) {
            $this->init();
        }
        
        if ($this->themeIsInstalled()) {
            $this->initTpl();
        }
        
        if ($this->systemIsInstalled()) {
            $this->store = new Database();
            $this->messages = new Messages();
            # installation
            if (! $this->store->isInstalled()) {
                $this->install();
            }
            $this->store->checkTags();
        }
    }
    
    private function init() 
    {
        Tools::initPhp();
        Session::$sessionName = 'poche'; 
        Session::init();

        if (isset($_SESSION['poche_user']) && $_SESSION['poche_user'] != array()) {
            $this->user = $_SESSION['poche_user'];
        } else {
            # fake user, just for install & login screens
            $this->user = new User();
            $this->user->setConfig($this->getDefaultConfig());
        }

        # l10n
        $language = $this->user->getConfigValue('language');
        putenv('LC_ALL=' . $language);
        setlocale(LC_ALL, $language);
        bindtextdomain($language, LOCALE); 
        textdomain($language); 

        # Pagination
        $this->pagination = new Paginator($this->user->getConfigValue('pager'), 'p');
        
        # Set up theme
        $themeDirectory = $this->user->getConfigValue('theme');
        
        if ($themeDirectory === false) {
            $themeDirectory = DEFAULT_THEME;
        }
        
        $this->currentTheme = $themeDirectory;

        # Set up language
        $languageDirectory = $this->user->getConfigValue('language');
        
        if ($languageDirectory === false) {
            $languageDirectory = DEFAULT_THEME;
        }
        
        $this->currentLanguage = $languageDirectory;
    }

    public function configFileIsAvailable() {
        if (! self::$configFileAvailable) {
            $this->notInstalledMessage[] = 'You have to rename inc/poche/config.inc.php.new to inc/poche/config.inc.php.';

            return false;
        }

        return true;
    }
    
    public function themeIsInstalled() {
        $passTheme = TRUE;
        # Twig is an absolute requirement for Poche to function. Abort immediately if the Composer installer hasn't been run yet
        if (! self::$canRenderTemplates) {
            $this->notInstalledMessage[] = 'Twig does not seem to be installed. Please initialize the Composer installation to automatically fetch dependencies. Have a look at <a href="http://doc.wallabag.org/doku.php?id=users:begin:install">the documentation.</a>';
            $passTheme = FALSE;
        }

        if (! is_writable(CACHE)) {
            $this->notInstalledMessage[] = 'You don\'t have write access on cache directory.';

            self::$canRenderTemplates = false;

            $passTheme = FALSE;
        } 
        
        # Check if the selected theme and its requirements are present
        $theme = $this->getTheme();

        if ($theme != '' && ! is_dir(THEME . '/' . $theme)) {
            $this->notInstalledMessage[] = 'The currently selected theme (' . $theme . ') does not seem to be properly installed (Missing directory: ' . THEME . '/' . $theme . ')';
            
            self::$canRenderTemplates = false;
            
            $passTheme = FALSE;
        }
        
        $themeInfo = $this->getThemeInfo($theme);
        if (isset($themeInfo['requirements']) && is_array($themeInfo['requirements'])) {
            foreach ($themeInfo['requirements'] as $requiredTheme) {
                if (! is_dir(THEME . '/' . $requiredTheme)) {
                    $this->notInstalledMessage[] = 'The required "' . $requiredTheme . '" theme is missing for the current theme (' . $theme . ')';
                
                    self::$canRenderTemplates = false;
                
                    $passTheme = FALSE;
                }
            }
        }

        if (!$passTheme) {
            return FALSE;
        }

        
        return true;
    }
    
    /**
     * all checks before installation.
     * @todo move HTML to template
     * @return boolean 
     */
    public function systemIsInstalled()
    {
        $msg = TRUE;
        
        $configSalt = defined('SALT') ? constant('SALT') : '';
        
        if (empty($configSalt)) {
            $this->notInstalledMessage[] = 'You have not yet filled in the SALT value in the config.inc.php file.';
            $msg = FALSE;
        }
        if (STORAGE == 'sqlite' && ! file_exists(STORAGE_SQLITE)) {
            Tools::logm('sqlite file doesn\'t exist');
            $this->notInstalledMessage[] = 'sqlite file doesn\'t exist, you can find it in install folder. Copy it in /db folder.';
            $msg = FALSE;
        }
        if (is_dir(ROOT . '/install') && ! DEBUG_POCHE) {
            $this->notInstalledMessage[] = 'you have to delete the /install folder before using poche.';
            $msg = FALSE;
        }
        if (STORAGE == 'sqlite' && ! is_writable(STORAGE_SQLITE)) {
            Tools::logm('you don\'t have write access on sqlite file');
            $this->notInstalledMessage[] = 'You don\'t have write access on sqlite file.';
            $msg = FALSE;
        }

        if (! $msg) {
            return false;
        }

        return true;
    }
    
    public function getNotInstalledMessage() {
        return $this->notInstalledMessage;
    }

    private function initTpl()
    {
        $loaderChain = new Twig_Loader_Chain();
        $theme = $this->getTheme();
       
        # add the current theme as first to the loader chain so Twig will look there first for overridden template files
        try {
            $loaderChain->addLoader(new Twig_Loader_Filesystem(THEME . '/' . $theme));
        } catch (Twig_Error_Loader $e) {
            # @todo isInstalled() should catch this, inject Twig later
            die('The currently selected theme (' . $theme . ') does not seem to be properly installed (' . THEME . '/' . $theme .' is missing)');
        }
        
        # add all required themes to the loader chain
        $themeInfo = $this->getThemeInfo($theme);
        if (isset($themeInfo['requirements']) && is_array($themeInfo['requirements'])) {
            foreach ($themeInfo['requirements'] as $requiredTheme) {
                try {
                    $loaderChain->addLoader(new Twig_Loader_Filesystem(THEME . '/' . $requiredTheme));
                } catch (Twig_Error_Loader $e) {
                    # @todo isInstalled() should catch this, inject Twig later
                    die('The required "' . $requiredTheme . '" theme is missing for the current theme (' . $theme . ')');
                }
            }
        }
        
        if (DEBUG_POCHE) {
            $twigParams = array();
        } else {
            $twigParams = array('cache' => CACHE);
        }
        
        $this->tpl = new Twig_Environment($loaderChain, $twigParams);
        $this->tpl->addExtension(new Twig_Extensions_Extension_I18n());
        
        # filter to display domain name of an url
        $filter = new Twig_SimpleFilter('getDomain', 'Tools::getDomain');
        $this->tpl->addFilter($filter);

        # filter for reading time
        $filter = new Twig_SimpleFilter('getReadingTime', 'Tools::getReadingTime');
        $this->tpl->addFilter($filter);
        
        # filter for simple filenames in config view
        $filter = new Twig_SimpleFilter('getPrettyFilename', function($string) { return str_replace(ROOT, '', $string); });
        $this->tpl->addFilter($filter);
    }

    private function install()
    {
        Tools::logm('poche still not installed');
        echo $this->tpl->render('install.twig', array(
            'token' => Session::getToken(),
            'theme' => $this->getTheme(),
            'poche_url' => Tools::getPocheUrl()
        ));
        if (isset($_GET['install'])) {
            if (($_POST['password'] == $_POST['password_repeat']) 
                && $_POST['password'] != "" && $_POST['login'] != "") {
                # let's rock, install poche baby !
                if ($this->store->install($_POST['login'], Tools::encodeString($_POST['password'] . $_POST['login'])))
                {
                    Session::logout();
                    Tools::logm('poche is now installed');
                    Tools::redirect();
                }
            }
            else {
                Tools::logm('error during installation');
                Tools::redirect();
            }
        }
        exit();
    }
    
    public function getTheme() {
        return $this->currentTheme;
    }

    /**
     * Provides theme information by parsing theme.ini file if present in the theme's root directory.
     * In all cases, the following data will be returned:
     * - name: theme's name, or key if the theme is unnamed,
     * - current: boolean informing if the theme is the current user theme.
     *
     * @param string $theme Theme key (directory name)
     * @return array|boolean Theme information, or false if the theme doesn't exist.
     */
    public function getThemeInfo($theme) {
        if (!is_dir(THEME . '/' . $theme)) {
            return false;
        }

        $themeIniFile = THEME . '/' . $theme . '/theme.ini';
        $themeInfo = array();

        if (is_file($themeIniFile) && is_readable($themeIniFile)) {
            $themeInfo = parse_ini_file($themeIniFile);
        }
        
        if ($themeInfo === false) {
            $themeInfo = array();
        }
        if (!isset($themeInfo['name'])) {
            $themeInfo['name'] = $theme;
        }
        $themeInfo['current'] = ($theme === $this->getTheme());

        return $themeInfo;
    }
    
    public function getInstalledThemes() {
        $handle = opendir(THEME);
        $themes = array();

        while (($theme = readdir($handle)) !== false) {
            # Themes are stored in a directory, so all directory names are themes
            # @todo move theme installation data to database
            if (!is_dir(THEME . '/' . $theme) || in_array($theme, array('.', '..'))) {
                continue;
            }

            $themes[$theme] = $this->getThemeInfo($theme);
        }

        return $themes;
    }

    public function getLanguage() {
        return $this->currentLanguage;
    }

    public function getInstalledLanguages() {
        $handle = opendir(LOCALE);
        $languages = array();
        
        while (($language = readdir($handle)) !== false) {
            # Languages are stored in a directory, so all directory names are languages
            # @todo move language installation data to database
            if (! is_dir(LOCALE . '/' . $language) || in_array($language, array('..', '.'))) {
                continue;
            }
            
            $current = false;
            
            if ($language === $this->getLanguage()) {
                $current = true;
            }
            
            $languages[] = array('name' => $language, 'current' => $current);
        }
        
        return $languages;
    }

    public function getDefaultConfig()
    {   
        return array(
            'pager' => PAGINATION,
            'language' => LANG,
            'theme' => DEFAULT_THEME
        );
    }

    protected function getPageContent(Url $url)
    {
        $options = array('http' => array('user_agent' => 'poche'));
        if (isset($_SERVER['AUTH_TYPE']) && "basic" === strtolower($_SERVER['AUTH_TYPE'])) {
            $options['http']['header'] = sprintf(
                "Authorization: Basic %s", 
                base64_encode(
                    sprintf('%s:%s', $_SERVER['PHP_AUTH_USER'], $_SERVER['PHP_AUTH_PW'])
                )
            );
        }
        $context = stream_context_create($options);
        $json = file_get_contents(Tools::getPocheUrl() . '/inc/3rdparty/makefulltextfeed.php?url='.urlencode($url->getUrl()).'&max=5&links=preserve&exc=&format=json&submit=Create+Feed', false, $context);
        return json_decode($json, true);
    }

    /**
     * Call action (mark as fav, archive, delete, etc.)
     */
    public function action($action, Url $url, $id = 0, $import = FALSE, $autoclose = FALSE)
    {
        switch ($action)
        {
            case 'add':
                $content = $this->getPageContent($url);
                $title = $content['rss']['channel']['item']['title'];
                $body = $content['rss']['channel']['item']['description'];

                if ($this->store->add($url->getUrl(), $title, $body, $this->user->getId())) {
                    Tools::logm('add link ' . $url->getUrl());
                    $sequence = '';
                    if (STORAGE == 'postgres') {
                        $sequence = 'entries_id_seq';
                    }
                    $last_id = $this->store->getLastId($sequence);
                    if (DOWNLOAD_PICTURES) {
                        $content = filtre_picture($body, $url->getUrl(), $last_id);
                        Tools::logm('updating content article');
                        $this->store->updateContent($last_id, $content, $this->user->getId());
                    }
                    if (!$import) {
                        $this->messages->add('s', _('the link has been added successfully'));
                    }
                }
                else {
                    if (!$import) {
                        $this->messages->add('e', _('error during insertion : the link wasn\'t added'));
                        Tools::logm('error during insertion : the link wasn\'t added ' . $url->getUrl());
                    }
                }

                if (!$import) {
                    if ($autoclose == TRUE) {
                      Tools::redirect('?view=home');
                    } else {
                      Tools::redirect('?view=home&closewin=true');
                    }
                }
                break;
            case 'delete':
                $msg = 'delete link #' . $id;
                if ($this->store->deleteById($id, $this->user->getId())) {
                    if (DOWNLOAD_PICTURES) {
                        remove_directory(ABS_PATH . $id);
                    }
                    $this->messages->add('s', _('the link has been deleted successfully'));
                }
                else {
                    $this->messages->add('e', _('the link wasn\'t deleted'));
                    $msg = 'error : can\'t delete link #' . $id;
                }
                Tools::logm($msg);
                Tools::redirect('?');
                break;
            case 'toggle_fav' :
                $this->store->favoriteById($id, $this->user->getId());
                Tools::logm('mark as favorite link #' . $id);
                if (!$import) {
                    Tools::redirect();
                }
                break;
            case 'toggle_archive' :
                $this->store->archiveById($id, $this->user->getId());
                Tools::logm('archive link #' . $id);
                if (!$import) {
                    Tools::redirect();
                }
                break;
            case 'add_tag' :
                $tags = explode(',', $_POST['value']);
                $entry_id = $_POST['entry_id'];
                foreach($tags as $key => $tag_value) {
                    $value = trim($tag_value);
                    $tag = $this->store->retrieveTagByValue($value);

                    if (is_null($tag)) {
                        # we create the tag
                        $tag = $this->store->createTag($value);
                        $sequence = '';
                        if (STORAGE == 'postgres') {
                            $sequence = 'tags_id_seq';
                        }
                        $tag_id = $this->store->getLastId($sequence);
                    }
                    else {
                        $tag_id = $tag['id'];
                    }

                    # we assign the tag to the article
                    $this->store->setTagToEntry($tag_id, $entry_id);
                }
                Tools::redirect();
                break;
            case 'remove_tag' :
                $tag_id = $_GET['tag_id'];
                $this->store->removeTagForEntry($id, $tag_id);
                Tools::redirect();
                break;
            default:
                break;
        }
    }

    function displayView($view, $id = 0)
    {
        $tpl_vars = array();

        switch ($view)
        {
            case 'config':
                $dev = $this->getPocheVersion('dev');
                $prod = $this->getPocheVersion('prod');
                $compare_dev = version_compare(POCHE, $dev);
                $compare_prod = version_compare(POCHE, $prod);
                $themes = $this->getInstalledThemes();
                $languages = $this->getInstalledLanguages();
                $token = $this->user->getConfigValue('token');
                $http_auth = (isset($_SERVER['PHP_AUTH_USER']) || isset($_SERVER['REMOTE_USER'])) ? true : false;
                $tpl_vars = array(
                    'themes' => $themes,
                    'languages' => $languages,
                    'dev' => $dev,
                    'prod' => $prod,
                    'compare_dev' => $compare_dev,
                    'compare_prod' => $compare_prod,
                    'token' => $token,
                    'user_id' => $this->user->getId(),
                    'http_auth' => $http_auth,
                );
                Tools::logm('config view');
                break;
            case 'edit-tags':
                # tags
                $tags = $this->store->retrieveTagsByEntry($id);
                $tpl_vars = array(
                    'entry_id' => $id,
                    'tags' => $tags,
                );
                break;
            case 'tag':
                $entries = $this->store->retrieveEntriesByTag($id);
                $tag = $this->store->retrieveTag($id);
                $tpl_vars = array(
                    'tag' => $tag,
                    'entries' => $entries,
                );
                break;
            case 'tags':
                $token = $this->user->getConfigValue('token');
                $tags = $this->store->retrieveAllTags();
                $tpl_vars = array(
                    'token' => $token,
                    'user_id' => $this->user->getId(),
                    'tags' => $tags,
                );
                break;
            case 'view':
                $entry = $this->store->retrieveOneById($id, $this->user->getId());
                if ($entry != NULL) {
                    Tools::logm('view link #' . $id);
                    $content = $entry['content'];
                    if (function_exists('tidy_parse_string')) {
                        $tidy = tidy_parse_string($content, array('indent'=>true, 'show-body-only' => true), 'UTF8');
                        $tidy->cleanRepair();
                        $content = $tidy->value;
                    }

                    # flattr checking
                    $flattr = new FlattrItem();
                    $flattr->checkItem($entry['url'], $entry['id']);

                    # tags
                    $tags = $this->store->retrieveTagsByEntry($entry['id']);

                    $tpl_vars = array(
                        'entry' => $entry,
                        'content' => $content,
                        'flattr' => $flattr,
                        'tags' => $tags
                    );
                }
                else {
                    Tools::logm('error in view call : entry is null');
                }
                break;
            default: # home, favorites and archive views 
                $entries = $this->store->getEntriesByView($view, $this->user->getId());
                $tpl_vars = array(
                    'entries' => '',
                    'page_links' => '',
                    'nb_results' => '',
                );
                
                if (count($entries) > 0) {
                    $this->pagination->set_total(count($entries));
                    $page_links = $this->pagination->page_links('?view=' . $view . '&sort=' . $_SESSION['sort'] . '&');
                    $datas = $this->store->getEntriesByView($view, $this->user->getId(), $this->pagination->get_limit());
                    $tpl_vars['entries'] = $datas;
                    $tpl_vars['page_links'] = $page_links;
                    $tpl_vars['nb_results'] = count($entries);
                }
                Tools::logm('display ' . $view . ' view');
                break;
        }

        return $tpl_vars;
    }

    /**
     * update the password of the current user. 
     * if MODE_DEMO is TRUE, the password can't be updated. 
     * @todo add the return value
     * @todo set the new password in function header like this updatePassword($newPassword)
     * @return boolean
     */
    public function updatePassword()
    {
        if (MODE_DEMO) {
            $this->messages->add('i', _('in demo mode, you can\'t update your password'));
            Tools::logm('in demo mode, you can\'t do this');
            Tools::redirect('?view=config');
        }
        else {
            if (isset($_POST['password']) && isset($_POST['password_repeat'])) {
                if ($_POST['password'] == $_POST['password_repeat'] && $_POST['password'] != "") {
                    $this->messages->add('s', _('your password has been updated'));
                    $this->store->updatePassword($this->user->getId(), Tools::encodeString($_POST['password'] . $this->user->getUsername()));
                    Session::logout();
                    Tools::logm('password updated');
                    Tools::redirect();
                }
                else {
                    $this->messages->add('e', _('the two fields have to be filled & the password must be the same in the two fields'));
                    Tools::redirect('?view=config');
                }
            }
        }
    }
    
    public function updateTheme()
    {
        # no data
        if (empty($_POST['theme'])) {
        }
        
        # we are not going to change it to the current theme...
        if ($_POST['theme'] == $this->getTheme()) {
            $this->messages->add('w', _('still using the "' . $this->getTheme() . '" theme!'));
            Tools::redirect('?view=config');
        }
        
        $themes = $this->getInstalledThemes();
        $actualTheme = false;
        
        foreach (array_keys($themes) as $theme) {
            if ($theme == $_POST['theme']) {
                $actualTheme = true;
                break;
            }
        }
        
        if (! $actualTheme) {
            $this->messages->add('e', _('that theme does not seem to be installed'));
            Tools::redirect('?view=config');
        }
        
        $this->store->updateUserConfig($this->user->getId(), 'theme', $_POST['theme']);
        $this->messages->add('s', _('you have changed your theme preferences'));
        
        $currentConfig = $_SESSION['poche_user']->config;
        $currentConfig['theme'] = $_POST['theme'];
        
        $_SESSION['poche_user']->setConfig($currentConfig);
        
        Tools::redirect('?view=config');
    }

    public function updateLanguage()
    {
        # no data
        if (empty($_POST['language'])) {
        }
        
        # we are not going to change it to the current language...
        if ($_POST['language'] == $this->getLanguage()) {
            $this->messages->add('w', _('still using the "' . $this->getLanguage() . '" language!'));
            Tools::redirect('?view=config');
        }
        
        $languages = $this->getInstalledLanguages();
        $actualLanguage = false;
        
        foreach ($languages as $language) {
            if ($language['name'] == $_POST['language']) {
                $actualLanguage = true;
                break;
            }
        }
        
        if (! $actualLanguage) {
            $this->messages->add('e', _('that language does not seem to be installed'));
            Tools::redirect('?view=config');
        }
        
        $this->store->updateUserConfig($this->user->getId(), 'language', $_POST['language']);
        $this->messages->add('s', _('you have changed your language preferences'));
        
        $currentConfig = $_SESSION['poche_user']->config;
        $currentConfig['language'] = $_POST['language'];
        
        $_SESSION['poche_user']->setConfig($currentConfig);
        
        Tools::redirect('?view=config');
    }

    /**
     * get credentials from differents sources
     * it redirects the user to the $referer link
     * @return array
     */
    private function credentials() {
        if(isset($_SERVER['PHP_AUTH_USER'])) {
            return array($_SERVER['PHP_AUTH_USER'],'php_auth');
        }
        if(!empty($_POST['login']) && !empty($_POST['password'])) {
            return array($_POST['login'],$_POST['password']);
        }
        if(isset($_SERVER['REMOTE_USER'])) {
            return array($_SERVER['REMOTE_USER'],'http_auth');
        }

        return array(false,false);
     }

    /**
     * checks if login & password are correct and save the user in session.
     * it redirects the user to the $referer link
     * @param  string $referer the url to redirect after login
     * @todo add the return value
     * @return boolean
     */
    public function login($referer)
    {
        list($login,$password)=$this->credentials();
        if($login === false || $password === false) {
            $this->messages->add('e', _('login failed: you have to fill all fields'));
            Tools::logm('login failed');
            Tools::redirect();
        }
        if (!empty($login) && !empty($password)) {
            $user = $this->store->login($login, Tools::encodeString($password . $login));
            if ($user != array()) {
                # Save login into Session
            	$longlastingsession = isset($_POST['longlastingsession']);
                Session::login($user['username'], $user['password'], $login, Tools::encodeString($password . $login), $longlastingsession, array('poche_user' => new User($user)));
                $this->messages->add('s', _('welcome to your poche'));
                Tools::logm('login successful');
                Tools::redirect($referer);
            }
            $this->messages->add('e', _('login failed: bad login or password'));
            Tools::logm('login failed');
            Tools::redirect();
        }
    }

    /**
     * log out the poche user. It cleans the session.
     * @todo add the return value
     * @return boolean 
     */
    public function logout()
    {
        $this->user = array();
        Session::logout();
        $this->messages->add('s', _('see you soon!'));
        Tools::logm('logout');
        Tools::redirect();
    }

    /**
     * import from Instapaper. poche needs a ./instapaper-export.html file
     * @todo add the return value
     * @param string $targetFile the file used for importing
     * @return boolean
     */
    private function importFromInstapaper($targetFile)
    {
        # TODO gestion des articles favs
        $html = new simple_html_dom();
        $html->load_file($targetFile);
        Tools::logm('starting import from instapaper');

        $read = 0;
        $errors = array();
        foreach($html->find('ol') as $ul)
        {
            foreach($ul->find('li') as $li)
            {
                $a = $li->find('a');
                $url = new Url(base64_encode($a[0]->href));
                $this->action('add', $url, 0, TRUE);
                if ($read == '1') {
                    $sequence = '';
                    if (STORAGE == 'postgres') {
                        $sequence = 'entries_id_seq';
                    }
                    $last_id = $this->store->getLastId($sequence);
                    $this->action('toggle_archive', $url, $last_id, TRUE);
                }
            }

            # the second <ol> is for read links
            $read = 1;
        }
        $this->messages->add('s', _('import from instapaper completed'));
        Tools::logm('import from instapaper completed');
        Tools::redirect();
    }

    /**
     * import from Pocket. poche needs a ./ril_export.html file
     * @todo add the return value
     * @param string $targetFile the file used for importing
     * @return boolean 
     */
    private function importFromPocket($targetFile)
    {
        # TODO gestion des articles favs
        $html = new simple_html_dom();
        $html->load_file($targetFile);
        Tools::logm('starting import from pocket');

        $read = 0;
        $errors = array();
        foreach($html->find('ul') as $ul)
        {
            foreach($ul->find('li') as $li)
            {
                $a = $li->find('a');
                $url = new Url(base64_encode($a[0]->href));
                $this->action('add', $url, 0, TRUE);
                if ($read == '1') {
                        $sequence = '';
                        if (STORAGE == 'postgres') {
                            $sequence = 'entries_id_seq';
                        }
                    $last_id = $this->store->getLastId($sequence);
                    $this->action('toggle_archive', $url, $last_id, TRUE);
                }
            }
            
            # the second <ul> is for read links
            $read = 1;
        }
        $this->messages->add('s', _('import from pocket completed'));
        Tools::logm('import from pocket completed');
        Tools::redirect();
    }

    /**
     * import from Readability. poche needs a ./readability file
     * @todo add the return value
     * @param string $targetFile the file used for importing
     * @return boolean 
     */
    private function importFromReadability($targetFile)
    {
        # TODO gestion des articles lus / favs
        $str_data = file_get_contents($targetFile);
        $data = json_decode($str_data,true);
        Tools::logm('starting import from Readability');
        $count = 0;
        foreach ($data as $key => $value) {
            $url = NULL;
            $favorite = FALSE;
            $archive = FALSE;
            foreach ($value as $item) {
                foreach ($item as $attr => $value) {
                    if ($attr == 'article__url') {
                        $url = new Url(base64_encode($value));
                    }
                    $sequence = '';
                    if (STORAGE == 'postgres') {
                        $sequence = 'entries_id_seq';
                    }
                    if ($value == 'true') {
                        if ($attr == 'favorite') {
                            $favorite = TRUE;
                        }
                        if ($attr == 'archive') {
                            $archive = TRUE;
                        }
                    }
                }

                # we can add the url
                if (!is_null($url) && $url->isCorrect()) {
                    $this->action('add', $url, 0, TRUE);
                    $count++;
                    if ($favorite) {
                        $last_id = $this->store->getLastId($sequence);
                        $this->action('toggle_fav', $url, $last_id, TRUE);
                    }
                    if ($archive) {
                        $last_id = $this->store->getLastId($sequence);
                        $this->action('toggle_archive', $url, $last_id, TRUE);
                    }
                }
            }
        }
        $this->messages->add('s', _('import from Readability completed. ' . $count . ' new links.'));
        Tools::logm('import from Readability completed');
        Tools::redirect();
    }

    /**
     * import from Poche exported file
     * @param string $targetFile the file used for importing
     * @return boolean 
     */
    private function importFromPoche($targetFile)
    {
        $str_data = file_get_contents($targetFile);
        $data = json_decode($str_data,true);
        Tools::logm('starting import from Poche');


        $sequence = '';
        if (STORAGE == 'postgres') {
            $sequence = 'entries_id_seq';
        }

        $count = 0;
        foreach ($data as $value) {

            $url = new Url(base64_encode($value['url']));
            $favorite = ($value['is_fav'] == -1);
            $archive = ($value['is_read'] == -1);
    
            # we can add the url
            if (!is_null($url) && $url->isCorrect()) {
                
                $this->action('add', $url, 0, TRUE);
                
                $count++;
                if ($favorite) {
                    $last_id = $this->store->getLastId($sequence);
                    $this->action('toggle_fav', $url, $last_id, TRUE);
                }
                if ($archive) {
                    $last_id = $this->store->getLastId($sequence);
                    $this->action('toggle_archive', $url, $last_id, TRUE);
                }
            }
            
        }
        $this->messages->add('s', _('import from Poche completed. ' . $count . ' new links.'));
        Tools::logm('import from Poche completed');
        Tools::redirect();
    }

    /**
     * import datas into your poche
     * @param  string $from name of the service to import : pocket, instapaper or readability
     * @todo add the return value
     * @return boolean       
     */
    public function import($from)
    {
        $providers = array(
            'pocket' => 'importFromPocket',
            'readability' => 'importFromReadability',
            'instapaper' => 'importFromInstapaper',
            'poche' => 'importFromPoche',
        );
        
        if (! isset($providers[$from])) {
            $this->messages->add('e', _('Unknown import provider.'));
            Tools::redirect();
        }
        
        $targetDefinition = 'IMPORT_' . strtoupper($from) . '_FILE';
        $targetFile = constant($targetDefinition);
        
        if (! defined($targetDefinition)) {
            $this->messages->add('e', _('Incomplete inc/poche/define.inc.php file, please define "' . $targetDefinition . '".'));
            Tools::redirect();
        }
        
        if (! file_exists($targetFile)) {
            $this->messages->add('e', _('Could not find required "' . $targetFile . '" import file.'));
            Tools::redirect();
        }
        
        $this->$providers[$from]($targetFile);
    }

    /**
     * export poche entries in json
     * @return json all poche entries
     */
    public function export()
    {
        $entries = $this->store->retrieveAll($this->user->getId());
        echo $this->tpl->render('export.twig', array(
            'export' => Tools::renderJson($entries),
        ));
        Tools::logm('export view');
    }

    /**
     * Checks online the latest version of poche and cache it
     * @param  string $which 'prod' or 'dev'
     * @return string        latest $which version
     */
    private function getPocheVersion($which = 'prod')
    {
        $cache_file = CACHE . '/' . $which;

        # checks if the cached version file exists
        if (file_exists($cache_file) && (filemtime($cache_file) > (time() - 86400 ))) {
           $version = file_get_contents($cache_file);
        } else {
           $version = file_get_contents('http://static.wallabag.org/versions/' . $which);
           file_put_contents($cache_file, $version, LOCK_EX);
        }
        return $version;
    }

    public function generateToken()
    {
        if (ini_get('open_basedir') === '') {
            $token = substr(base64_encode(file_get_contents('/dev/urandom', false, null, 0, 20)), 0, 15);
        }
        else {
            $token = substr(base64_encode(uniqid(mt_rand(), true)), 0, 20);
        }

        $this->store->updateUserConfig($this->user->getId(), 'token', $token);
        $currentConfig = $_SESSION['poche_user']->config;
        $currentConfig['token'] = $token;
        $_SESSION['poche_user']->setConfig($currentConfig);
    }

    public function generateFeeds($token, $user_id, $tag_id, $type = 'home')
    {
        $allowed_types = array('home', 'fav', 'archive', 'tag');
        $config = $this->store->getConfigUser($user_id);

        if (!in_array($type, $allowed_types) ||
            $token != $config['token']) {
            die(_('Uh, there is a problem while generating feeds.'));
        }
        // Check the token

        $feed = new FeedWriter(RSS2);
        $feed->setTitle('poche - ' . $type . ' feed');
        $feed->setLink(Tools::getPocheUrl());
        $feed->setChannelElement('updated', date(DATE_RSS , time()));
        $feed->setChannelElement('author', 'poche');

        if ($type == 'tag') {
            $entries = $this->store->retrieveEntriesByTag($tag_id);
        }
        else {
            $entries = $this->store->getEntriesByView($type, $user_id);
        }

        if (count($entries) > 0) {
            foreach ($entries as $entry) {
                $newItem = $feed->createNewItem();
                $newItem->setTitle($entry['title']);
                $newItem->setLink(Tools::getPocheUrl() . '?view=view&amp;id=' . $entry['id']);
                $newItem->setDate(time());
                $newItem->setDescription($entry['content']);
                $feed->addItem($newItem);
            }
        }

        $feed->genarateFeed();
        exit;
    }
}